S
M
T
W
T
F
S
26
79°
66°
27
83°
61°
28
87°
62°
29
91°
65°
30
93°
66°
1
90°
68°
2
94°
71°
3
98°
77°
4
80°
72°
5
80°
66°
6
86°
62°
7
97°
67°
8
101°
71°
9
105°
74°
10
106°
75°
11
109°
77°
12
108°
80°
13
101°
81°
14
101°
75°
15
98°
73°
16
100°
74°
17
96°
73°
18
87°
68°
19
91°
68°
20
94°
70°
21
96°
69°
22
98°
72°
23
99°
74°
24
100°
76°
25
98°
80°
26
97°
72°
27
96°
72°
28
92°
71°
29
89°
60°
30
95°
65°
31
102°
70°
1
105°
73°
2
108°
72°
3
109°
76°
4
107°
77°
5
109°
76°
6
108°
79°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in St. Johns
St. Johns's May 2026 forecast shows daily high temperatures ranging from 89° to 109°, with overnight lows between 60° and 79°. The average high for May is 104° with an average low of 72°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in St. Johns. See also: June | July | August.
